on the Surf Plot, what does the different colors of the line mean?
ya, this isn't the most obvious of features on Swellinfo, and will change with the next upgrade. But, in the meantime:
The colors corespond to the dominant swell. So on the surfplots, if you click on view details, on the left side, the swell table will come up. The color of the surfplot matches the dominant swell category in the swell table below.